The Final Phase: Kondratiev Winter and the End of a Multi-Decade Bull Market

We Have Reached the Road’s End: The Blow-Off Top, Kondratiev Winter, and the Great Unwinding Ahead

Henrik Zeberg's avatar
Henrik Zeberg
Dec 01, 2025
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End of a Multi-Decade Bull Market – The Structural Peak

I have been analyzing market cycles for decades, and my long-term chart of the S&P 500 is sounding a clear alarm: we are structurally at the end of a multi-decade bull market. This is not a routine correction or mid-cycle pause – it is the terminal phase of a secular boom that has been building for generations. The S&P 500’s towering rise over the past decades has brought us to a climax that mirrors past epic market peaks. The technical and fundamental indicators on my chart show a culmination of excess that only ever appears at major secular tops. We are now standing at the precipice of a historic reversal.

On the long-term chart (Chart 1), every major bull market of the past century is identifiable by a steep, euphoric final rally followed by a brutal collapse. The current market stands right at such a peak, with an extraordinary run-up that has all the hallmarks of a final blow-off. Prices have accelerated far above long-term trend channels, investor confidence is absolute, and any sense of risk has all but evaporated. In other words, the structure of the market now matches the climax of prior multi-decade bulls. This is the same setup we saw in 1929 before the Great Depression, and again in 2000 before the Tech Bust – only today’s scale is even larger.

Simply put, the long bull run that began many years ago is reaching its terminal stage. The cyclical fingerprints are unmistakable. My analysis indicates that we have entered the endgame of this growth era, and a dramatic trend change is imminent. As we’ll explore, all evidence suggests that the current rally is the final surge of optimism before a long and painful decline.

Kondratiev Winter Has Arrived (Not Autumn)

Some analysts still believe we are in a “late autumn” phase of the economic super-cycle – a period of high inflation and final prosperity before the downturn. I strongly disagree. This is not Kondratiev Autumn; this is Kondratiev Winter. All the signature elements of a Kondratiev Winter are now evident, indicating that the long-wave cycle has rolled over into its final, deflationary season.

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